INNER JOIN and LEFT JOIN: Direct Practice in PostgreSQL
In this video, we'll get straight to the point with a 100% practical tutorial on the most commonly used joins in PostgreSQL: INNER JOIN and LEFT JOIN.
Many people get confused about when to use each one, so I've prepared real-world examples joining tables so you can understand once and for all the visual and logical difference between these two operations.
📌 What you will learn:
How the JOIN syntax works in PostgreSQL.
INNER JOIN: Returning only data that has a match.
LEFT JOIN: How to keep the data from the main table even without a match in the secondary table.
Tips to avoid errors in the order of tables.